I still don't buy that this was a simple misconfiguration-
Facebook basically never modifies their BGP, why would they? What circumstances would ever cause them to send out updates withdrawing every route to themselves?
Facebook basically never modifies their BGP, why would they? What circumstances would ever cause them to send out updates withdrawing every route to themselves?
@penny Doesn't seem that implausible to me. If you almost never use something the automation around it is shit and probably nonstandard. Combined with the relatively common convention that calling an update function with the equivalent of 'None' for targets meaning you want to update everything this is a recipe for disaster.
Source: I'm aware of at least one outage in a major company triggered exactly by this, but mostly my ass.
